JPH042418A - Wire electrode expelling device in wire cut electric discharge machine - Google Patents

Abstract

PURPOSE:To smoothly surely nip a wire electrode between take-up rollers in the connection of the wire electrode by providing a wire inserting guide along the travelling direction of the wire electrode and a wire expelling guide formed to reciprocatingly approach and secede from the wire inserting guide. CONSTITUTION:A wire expelling guide 6 is advanced to approach a wire inserting guide 39 while take-up rollers 40 open and secede, and a wire electrode 42 from the wire inserting guide 39 is introduced into the wire expelling guide 6. Then, the wire expelling guide 6 is adapted to secede backward and the take-up rollers 40 are closed to nip the wire electrode 42 and expel it through the wire expelling guide 6.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wire configured to generate electrical discharge between a traveling wire electrode and a workpiece, and perform electrical discharge machining on the workpiece. The present invention relates to a device for discharging a wire electrode after electrical discharge machining in a cut electrical discharge machine.

[Conventional technology]

In general, in a wire-cut electric discharge machine, a wire electrode to which a discharge voltage is applied is inserted between a pair of guides having a hollow hole and stretched so as to be freely movable in the longitudinal direction, and a workpiece is disposed between the guides. is supported so as to be movable relative to the wire electrode within a plane perpendicular to the wire electrode. By generating electric discharge between this wire electrode and the workpiece.

For example, it is configured to cut a workpiece.

FIG. 3 is a partially cross-sectional explanatory diagram schematically showing the main part configuration of a conventional wire-cut electrical discharge machine. In Figure 3, 3
1 is a wire electrode reel, 32 is a feeding roller, 33.34
are an upper nozzle and a lower nozzle, respectively, and each has an electrode guide 35, 36 built therein. 37 is a guide roller, 38 is a guide block, 39 is a wire insertion guide, 4
0 is a winding roller, 45 is a wire discharge guide, and 41 is a dust box. The wire electrode 42 is inserted between the wire electrode reel 31 and the first winding roller 40 so as to run freely, and a predetermined tension is applied between the feeding roller 32 and the winding roller 40, so that the workpiece 43 A discharge occurs between the

The electrical discharge machining described above is performed.

In the wire-cut electrical discharge machine described above, the workpiece 43
Prior to electric discharge machining, the wire electrode 42 is moved to the feeding roller 3.
2 and the winding roller 40,
A guide hole 44 is previously drilled in the workpiece 43, and the wire electrode 42 is inserted into the guide hole 44 to start electrical discharge machining.

[Problem to be solved by the invention]

When inserting the wire electrode 42 in the wire-cut electrical discharge machine having the above configuration, there is a problem that the wire electrode 42 is not smoothly held between the wire insertion guide 39 and the winding roller 40 . That is, since the winding roller 40 is in pressure contact and the wire insertion guide 39 and the winding roller 40 are separated from each other, the tip of the wire electrode 42 is not pinched between the winding rollers 40, 40, and the S There are problems in that they get tangled with the upper roller 40 or fly out of the system. Also, the wire insertion guide 39
It is possible to shorten the distance between the winding roller 40 and the winding roller 40, but this is often impossible due to the relationship with other components. However, the tip of the wire electrode 42 is wound up a
- There is also a problem that the wire may protrude along the circumferential direction of the wire 40 and cannot be smoothly accommodated in the wire discharge guide 45 and the dust box 41. Note that some recent wire-cut electrical discharge machines automatically connect the two-wire electrode pi42, and there are many cases where automatic connection is performed multiple times even at night, so the wire electrode If any trouble occurs during the insertion or connection of wire 42, there is a problem in that the operating rate of the wire-cut electrical discharge machine is significantly reduced, and reliability in automatic or unmanned operation is significantly reduced.

The present invention solves the problems existing in the above-mentioned conventional technology, prevents troubles during insertion of wire electrodes, enables smooth automatic connection of wire electrodes, and provides an extremely reliable wire-cut electric discharge machine. It is an object of the present invention to provide a wire electrode ejecting device.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a wire-cut electric discharge machine configured to perform electric discharge machining on a workpiece by generating electric discharge between a traveling wire electrode and a workpiece. In a device that discharges wire electrodes after processing.

A pair of winding rollers are formed on the downstream side in the wire electrode running direction of a wire insertion guide formed so that the wire electrode can run therein, and are formed to be rotatable and capable of being opened and removed and closed and clamped relative to the wire electrode.

A wire insertion guide and a wire ejection guide are provided along the running direction of the wire electrode, and the wire ejection guide is formed so as to be movable toward and away from the wire.

When the hoisting roller is in the open and detached state, the wire ejection guide is moved forward to approach the wire insertion guide, the wire electrode from the wire insertion guide is introduced into the wire ejection guide, and then the wire ejection guide is moved back and removed, and the first hoisting roller is moved. Formed into a closed and clamped state.

The wire electrode is configured to be ejected via the wire ejection guide. A technical method was adopted.

(Embodiment) FIG. 1 is an explanatory diagram schematically showing an embodiment of the present invention, and the same parts are designated by the same reference numerals as in FIG. 3. In FIG. 1, a sensor 1 is provided near the exit of the wire insertion guide 39 and is configured to be able to detect the presence or absence of the wire electrode 42.

Next, the winding roller 40 is formed on the downstream side of the sensor 1 so as to be rotatable and to be able to open and separate from the wire electrode 42 and to close and hold the wire electrode 42 . That is, a winding roller 40 is attached to the free end of the link 4 which is rotatably engaged with the support member 3 provided on the frame 2.
is provided rotatably.

A cylinder 5 is interposed at the other end of the link 4, and a pair of winding rollers 40, 40 are formed so as to be able to open and separate from and close the wire electrode 42 by the operation of the cylinder 5. Note that one of the pair of take-up rollers 40, 40 may be used as the driving side and the other one as the driven side, but each of the first take-up rollers 40, 40 is capable of feeding the wire electrode 42 in the direction of the arrow. A wire discharge guide 6 is formed in a hollow cylindrical shape and allows the wire electrode 42 to run inside. Note that 7 is a cylinder, which is connected to the wire discharge guide 6 and connects the wire discharge guide 6 to the wire electrode 4.
It is possible to reciprocate along the two running directions.

With the above configuration, during normal machining, the wire electrode 4 is
2 is fed from the wire insertion guide 39 into the wire discharge guide 6, and the used wire electrode 5 is fed into the dust box 41.
It can be discharged inside.

Next, the effect when introducing a new wire electrode 42 will be explained with reference to FIG. 2. FIG. 2 is an explanatory diagram of the main part configuration schematically showing the operating state in the embodiment of the present invention,
Identical parts are designated by the same reference numerals as in FIG. 1 above. First, the cylinder 5 is operated to open and separate the pair of winding rollers 40, 40 via the link 4. In this case, the sensor l provided near the exit of the wire insertion guide 39 also advances the wire ejection guide 6 to the left by the operation of the zero-order cylinder 7, which moves upward in conjunction with the link 4, and inserts the wire. It is placed close to the exit of the guide 39. In this state, the wire electrode 42 is connected to the feed roller 3 shown in FIG.
2, the upper nozzle 33 and the guide hole 4 of the workpiece 43
4. Lower nozzle 34, guide roller 37. Guide bronc 3
The wire is fed into the wire insertion guide 39 through the day. In FIG. 2, if the wire electrode 42 is further fed, the wire electrode 42
2 is easily introduced into the wire ejection guide 6 from the wire insertion guide 39. After the wire electrode 42 has entered the wire discharge guide 6 by a predetermined distance.

By operating the cylinder 7 in the opposite direction to move the wire discharge guide 6 back to its original position, and further moving the cylinder 5 in the opposite direction, a pair of winding rollers 40, 40 are formed as shown in FIG.
can hold the wire electrode 42. Note that the wire electrode 4
2 is smoothly held by the winding rollers 40, 40, the sensor 1 detects that the wire electrode 42 is present, and it can be confirmed that the wire electrode 42 has been connected.

In this embodiment, an example is shown in which a mechanism consisting of a cylinder and a link is used as the opening/separating and closing/closing means for the first hoisting roller, but other opening/closing means may be used.
Furthermore, it goes without saying that something other than a cylinder may be used as the reciprocating means for the wire discharge guide.

[Effect of the invention] Since the present invention has the structure and operation as described above,
The wire electrode can be held between the winding rollers smoothly and reliably during wire electrode connection, greatly improving reliability during automatic or unmanned operation, and preventing trouble when inserting the wire electrode. There can be no such problem, and the operating rate of the wire-cut electrical discharge machine can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the main part configuration schematically showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the main part composition schematically showing the operating state of the embodiment of the present invention, and Fig. 3 is a conventional wire FIG. 1 is a partially cross-sectional explanatory diagram schematically showing the configuration of main parts of a cut electric discharge machine. 6th: Wire ejection guide, 39: Wire insertion guide, 40
: Winding roller, 42: Wire electrode.

Claims (1)

[Claims] A wire electrode after electrical discharge machining in a wire-cut electrical discharge machine configured to generate electrical discharge between a traveling wire electrode and a workpiece to perform electrical discharge machining on the workpiece. In the discharging device, a pair of windings are provided on the downstream side in the wire electrode running direction of a wire insertion guide formed so that the wire electrode can run therein, and formed so as to be rotatable and capable of being opened and removed and closed and clamped with respect to the wire electrode. An upper roller and a wire ejection guide formed to be able to reciprocate toward and away from the wire insertion guide along the running direction of the wire electrode are provided, and the wire ejection guide is moved forward and close to the wire insertion guide when the winding roller is in an open and separated state. , the wire electrode from the wire insertion guide is introduced into the wire ejection guide, and then the wire ejection guide is retreated and removed, the winding roller is closed and clamped, and the wire electrode is ejected through the wire ejection guide. A wire electrode ejecting device for a wire cut electric discharge machine, characterized in that the wire electrode discharging device comprises: